发现一个问题已经解释了这一点-如何在PHP中根据给定键的值对关联数组数组进行排序？
我有一个数组（A2）的数组（A1）。我想根据A2 中的键：值对对对A1中的所有A2进行排序
结构类似于
A1
->A2-1
->K1:Some Value
->K2:ValB
->A2-2
->K1:Other Value
->K2:ValB1
->A2-3
->K1:Some Value
->K2:ValB2
->A2-4
->K1:Other Value
->K2:ValB3
我想对A1中的数组进行排序，使K1的值为"其他值"的所有A2聚在一起，使K1值为"某个值"的全部A2聚在一起来
因此，在排序之后，A1中的阵列的最终顺序应该是A2-2、A2-4、A2-1、A2-3。PHP中有没有一个函数可以用来实现这一点？还是我必须解析整个数组并进行排序？
谢谢。
http://php.net/manual/en/function.array-multisort.php如果这不合适，还有很多其他的数组函数http://www.php.net/manual/en/ref.array.php
试试：
$A1 = array(
'A2-1' => array(
'K1' => 'Some Value',
'K2' => 'ValB',
),
'A2-2' => array(
'K1' => 'Other Value',
'K2' => 'ValB1',
),
'A2-3' => array(
'K1' => 'Some Value',
'K2' => 'ValB2',
),
'A2-4' => array(
'K1' => 'Other Value',
'K2' => 'ValB3',
)
);
function mySort($a, $b) {
if ($a['K1'] == $b['K1']) {
return strcmp($a['K2'], $b['K2']);
} else {
return strcmp($a['K1'], $b['K1']);
}
}
uasort($A1, 'mySort');
print_r($A1);
输出：
Array
(
[A2-2] => Array
(
[K1] => Other Value
[K2] => ValB1
)
[A2-4] => Array
(
[K1] => Other Value
[K2] => ValB3
)
[A2-1] => Array
(
[K1] => Some Value
[K2] => ValB
)
[A2-3] => Array
(
[K1] => Some Value
[K2] => ValB2
)
)
您需要类似以下内容：
usort($array, function($a, $b)
{
return strcmp($a['k1'], $b['k1']);
});
您可能需要用不同的排序函数（或运算符）替换strcmp，因为不清楚您到底在做什么。
strategy:
1. find unique values, put them aside.
2. loop through unique values
2.1 loop origial array
2.2 store sub array in $out if unique val = original val
<?php
$i=0;
$a3d = array(
$i++ => array(0=>'Some Value',1=>'ValB'),
$i++ => array(0=>'Other Value',1=>'ValB1'),
$i++ => array(0=>'Some Value',1=>'ValB2'),
$i++ => array(0=>'Zome moar',1=>'ValB4'),
$i++ => array(0=>'Other Value',1=>'ValB3'),
$i++ => array(0=>'Zome Moar',1=>'ValB4'),
);
print_r($a3d);
foreach ($a3d as $a2d){
$uniq[]= $a2d[0];
}
$uniq = array_unique($uniq);
sort($uniq);
print_r($uniq);
foreach ($uniq as $v){
foreach ($a3d as $kk => $a2d){
if ($a2d[0] == $v){
$out[]= $a2d;
unset($a3d[$kk]); // <--avoid rechecking elements
}
}
}
print_r(count($a3d));
print_r($out);
?>
$ php sort_array.php
Array
(
[0] => Array
(
[0] => Some Value
[1] => ValB
)
[1] => Array
(
[0] => Other Value
[1] => ValB1
)
[2] => Array
(
[0] => Some Value
[1] => ValB2
)
[3] => Array
(
[0] => Zome moar
[1] => ValB4
)
[4] => Array
(
[0] => Other Value
[1] => ValB3
)
[5] => Array
(
[0] => Zome Moar
[1] => ValB4
)
)
Array
(
[0] => Other Value
[1] => Some Value
[2] => Zome Moar
[3] => Zome moar
)
0Array
(
[0] => Array
(
[0] => Other Value
[1] => ValB1
)
[1] => Array
(
[0] => Other Value
[1] => ValB3
)
[2] => Array
(
[0] => Some Value
[1] => ValB
)
[3] => Array
(
[0] => Some Value
[1] => ValB2
)
[4] => Array
(
[0] => Zome Moar
[1] => ValB4
)
[5] => Array
(
[0] => Zome moar
[1] => ValB4
)
)